Using reaction time and co-contraction to differentiate acquired (secondary) from functional ‘fixed’ dystonia

Notably, the individual data on RT and co-contraction show clear overlap between the two groups. [...]even if these two parameters can be useful to differentiate at a group level, they are not suitable in this form as diagnostic criteria. [...]we did not find a pattern of response that was abnormal...

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Published inJournal of neurology, neurosurgery and psychiatry Vol. 86; no. 8; pp. 933 - 934
Main Authors Macerollo, A, Batla, A, Kassavetis, P, Parees, I, Bhatia, K P, Edwards, M J
Format Journal Article
LanguageEnglish
Published England BMJ Publishing Group LTD 01.08.2015
BMJ Publishing Group
SeriesLetter
Subjects
Diagnosis, Differential
Dystonic Disorders - classification
Dystonic Disorders - diagnosis
Dystonic Disorders - physiopathology
Electromyography
Humans
Laboratories
Muscle Contraction - physiology
Patients
PostScript
Posture
Reaction Time - physiology
Software
Variance analysis
DYSTONIA
EMG
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Summary:Notably, the individual data on RT and co-contraction show clear overlap between the two groups. [...]even if these two parameters can be useful to differentiate at a group level, they are not suitable in this form as diagnostic criteria. [...]we did not find a pattern of response that was abnormal in a different manner to AD (eg, failure to activate the muscles requested), which would have allowed a more positive differentiation of FD from AD.
Bibliography:SourceType-Other Sources-1
content type line 63
ObjectType-Correspondence-1
AM and AB contributed equally.
ISSN:0022-3050
1468-330X
DOI:10.1136/jnnp-2014-309040